Update default projects repo [ci skip]

spacy/about.py

@@ -4,4 +4,5 @@ __version__ = "3.0.0a16"
 __release__ = True
 __download_url__ = "https://github.com/explosion/spacy-models/releases/download"
 __compatibility__ = "https://raw.githubusercontent.com/explosion/spacy-models/master/compatibility.json"
-__projects__ = "https://github.com/explosion/spacy-boilerplates"
+__projects__ = "https://github.com/explosion/projects"
+__projects_branch__ = "v3"

spacy/cli/project/clone.py

@@ -16,7 +16,7 @@ def project_clone_cli(
     name: str = Arg(..., help="The name of the template to clone"),
     dest: Optional[Path] = Arg(None, help="Where to clone the project. Defaults to current working directory", exists=False),
     repo: str = Opt(about.__projects__, "--repo", "-r", help="The repository to clone from"),
-    branch: str = Opt("master", "--branch", "-b", help="The branch to clone from")
+    branch: str = Opt(about.__projects_branch__, "--branch", "-b", help="The branch to clone from")
     # fmt: on
 ):
     """Clone a project template from a repository. Calls into "git" and will
@@ -32,7 +32,11 @@ def project_clone_cli(
 
 
 def project_clone(
-    name: str, dest: Path, *, repo: str = about.__projects__, branch: str = "master"
+    name: str,
+    dest: Path,
+    *,
+    repo: str = about.__projects__,
+    branch: str = about.__projects_branch__,
 ) -> None:
     """Clone a project template from a repository.
 

website/docs/usage/projects.md

@@ -65,6 +65,8 @@ project template and copies the files to a local directory. You can then run the
 project, e.g. to train a pipeline and edit the commands and scripts to build
 fully custom workflows.
 
+<!-- TODO: update with real example project -->
+
 ```cli
 python -m spacy project clone some_example_project
 ```